#include <stdlib.h>
#include <stdio.h>
#include <math.h>

int main(int argc, char* argv[]) {
    if (argc != 3) {
        printf("Usage: exp <start> <end>\n");
        return 1;
    }

    int start = atoi(argv[1]);
    int end = atoi(argv[2]);

    if (start > end) {
        printf("The start value must be lower than the end value");
        return 1;
    }

    // On lance pari GP
    FILE* gp;
    char path[1035];
    gp = popen("echo 'forstep(i=0, 2, 0.1, print(exp(i)))\nquit\n' | /usr/bin/gp -q", "r");
    if (gp == NULL) {
        printf("GP n'est pas installé sur la machine\n");
        exit(1);
    }

    long double i = 0;
    while (fgets(path, sizeof(path)-1, gp) != NULL) {
        long double n = exp(i);
        printf("GP = %s", path);
        printf("C  = %.20Lf\n", n);
        i += 0.1;
    }
    // printf("%s\n", system("\\p 128\nforstep(i=1, 1000, 0.1, print(i \"=\"  ${fn}(i)))\nquit\n"));

    pclose(gp);

/*
    for (double i = (double)start ; i <= end ; i++) {
        printf("exp(%d)=%d", i, exp(i));
    }*/
}